Lucja Leonard was on track to beat her personal record at the Manchester Marathon this year - when it suddenly dawned on her that she needed the toilet.
Weighing up her options, she realised it was going to take her at least three minutes to use a Portaloo, and that would mean adding crucial time onto her race.
Having suffered with urinary incontinence for 10 years, the dilemma wasn't unusual for her. An experienced marathon runner, she normally stops around three times during the average race.
